Audi SQ7 4.0 V8 TT (Gasoline Non-OPF Equipped Vehicles) YOC: 2021 - 2024 Part: Cat-back Info: Cat Back System - Non Resonated (Loudest) - Fits to OE Tailpipes - Does not require cutting tailpipe design: pipe diameter: 76,2mm /3inch EC-approved: No Race system: No Valvesonic: No Part no.: SSXAU1025